EXHIBIT 10.3












                              GUARANTEE AGREEMENT

                        Princeton National Bancorp, Inc.

                           Dated as of July 15, 2005

























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TABLE OF CONTENTS
                                                                            PAGE
                                   ARTICLE I
                         DEFINITIONS AND INTERPRETATION

SECTION 1.1. Definitions and Interpretation................................... 1

                                   ARTICLE II
               POWERS, DUTIES AND RIGHTS OF THE GUARANTEE TRUSTEE

SECTION 2.1. Powers and Duties of the Guarantee Trustee ...................... 4

SECTION 2.2. Certain Rights of the Guarantee Trustee.......................... 5

SECTION 2.3. Not Responsible for Recitals or Issuance of Guarantee............ 7

SECTION 2.4. Events of Default; Waiver........................................ 7

SECTION 2.5. Events of Default; Notice........................................ 8

                                  ARTICLE III
                             THE GUARANTEE TRUSTEE

SECTION 3.1. The Guarantee Trustee; Eligibility .............................. 8

SECTION 3.2. Appointment, Removal and Resignation of the Guarantee Trustee ... 9

                                   ARTICLE IV
                                   GUARANTEE

SECTION 4.1. Guarantee ....................................................... 9

SECTION 4.2. Waiver of Notice and Demand .................................... 10

SECTION 4.3. Obligations Not Affected ....................................... 10

SECTION 4.4. Rights of Holders .............................................. 11

SECTION 4.5. Guarantee of Payment............................................ 11

SECTION 4.6. Subrogation .................................................... 11

SECTION 4.7. Independent Obligations ........................................ 12

SECTION 4.8. Enforcement .................................................... 12


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                               TABLE OF CONTENTS
                                  (continued)
                                                                            PAGE

                                   ARTICLE V
                   LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 5.1. Limitation of Transactions ..................................... 12

SECTION 5.2. Ranking ........................................................ 13

                                   ARTICLE VI
                                  TERMINATION

SECTION 6.1. Termination .................................................... 13

                                  ARTICLE VII
                                INDEMNIFICATION

SECTION 7.1. Exculpation..................................................... 14

SECTION 7.2. Indemnification................................................. 14

SECTION 7.3. Compensation; Reimbursement of Expenses......................... 15

                                  ARTICLE VIII
                                 MISCELLANEOUS

SECTION 8.1. Successors and Assigns.......................................... 16

SECTION 8.2. Amendments...................................................... 16

SECTION 8.3. Notices ........................................................ 16

SECTION 8.4. Benefit ........................................................ 17

SECTION 8.5. Governing Law .................................................. 17

SECTION 8.6. Counterparts ................................................... 17

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                              GUARANTEE AGREEMENT

     This GUARANTEE AGREEMENT (the "Guarantee"), dated as of July 15, 2005, is
executed and delivered by Princeton National Bancorp, Inc., incorporated in
Delaware (the "Guarantor"), and LaSalle Bank National Association, as trustee
(the "Guarantee Trustee"), for the benefit of the Holders (as defined herein)
from time to time of the Capital Securities (as defined herein) of PNBC Capital
Trust I, a Delaware statutory trust (the "Issuer").

     WHEREAS, pursuant to an Amended and Restated Declaration of Trust (the
"Declaration"), dated as of July 15, 2005, among the trustees named therein of
the Issuer, Princeton National Bancorp, Inc., as sponsor, and the Holders from
time to time of undivided beneficial interests in the assets of the Issuer, the
Issuer is issuing on the date hereof securities, having an aggregate liquidation
amount of up to $25,000,000, designated the TP Securities (the "Capital
Securities"); and

     WHEREAS, as incentive for the Holders to purchase the Capital Securities,
the Guarantor desires irrevocably and unconditionally to agree, to the extent
set forth in this Guarantee, to pay to the Holders of Capital Securities the
Guarantee Payments (as defined herein) and to make certain other payments on the
terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the purchase by each Holder of the
Capital Securities, which purchase the Guarantor hereby agrees shall benefit the
Guarantor, the Guarantor executes and delivers this Guarantee for the benefit of
the Holders.

                                   ARTICLE I
                         DEFINITIONS AND INTERPRETATION

SECTION 1.1. Definitions and Interpretation.

In this Guarantee, unless the context otherwise requires:

          (a) capitalized terms used in this Guarantee but not defined in the
     preamble above have the respective meanings assigned to them in this
     Section 1.1;

          (b) a term defined anywhere in this Guarantee has the same meaning
     throughout;

          (c) all references to "the Guarantee" or "this Guarantee" are to this
     Guarantee as modified, supplemented or amended from time to time;

          (d) all references in this Guarantee to Articles and Sections are to
     Articles and Sections of this Guarantee, unless otherwise specified;

          (e) terms defined in the Declaration as of the date of execution of
     this Guarantee have the same meanings when used in this Guarantee, unless
     otherwise defined in this Guarantee or unless the context otherwise
     requires; and

          (f) a reference to the singular includes the plural and vice versa.



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     "Beneficiaries" means any Person to whom the Issuer is or hereafter becomes
indebted or liable.

     "Corporate Trust Office" means the office of the Guarantee Trustee at which
the corporate trust business of the Guarantee Trustee shall, at any particular
time, be principally administered.

     "Covered Person" means any Holder of Capital Securities.

     "Debentures" means the junior subordinated debentures of Princeton National
Bancorp, Inc., designated the Junior Subordinated Debt Securities due 2035, held
by the Institutional Trustee (as defined in the Declaration) of the Issuer.

     "Event of Default" has the meaning set forth in Section 2.4.

     "Guarantee Payments" means the following payments or distributions, without
duplication, with respect to the Capital Securities, to the extent not paid or
made by the Issuer: (i) any accrued and unpaid Distributions (as defined in the
Declaration) which are required to be paid on such Capital Securities to the
extent the Issuer has funds available in the Property Account (as defined in the
Declaration) therefor at such time, (ii) the Redemption Price (as defined in the
Indenture) to the extent the Issuer has funds available in the Property Account
therefor at such time, with respect to any Capital Securities called for
redemption by the Issuer, (iii) the Special Redemption Price (as defined in the
Indenture) to the extent the Issuer has funds available in the Property Account
therefor at such time, with respect to Capital Securities called for redemption
upon the occurrence of a Special Event (as defined in the Indenture), and (iv)
upon a voluntary or involuntary liquidation, dissolution, winding-up or
termination of the Issuer (other than in connection with the distribution of
Debentures to the Holders of the Capital Securities in exchange therefor as
provided in the Declaration), the lesser of (a) the aggregate of the liquidation
amount and all accrued and unpaid Distributions on the Capital Securities to the
date of payment, to the extent the Issuer has funds available in the Property
Account therefor at such time, and (b) the amount of assets of the Issuer
remaining available for distribution to Holders in liquidation of the Issuer
after satisfaction of liabilities to creditors of the Issuer as required by
applicable law (in either case, the "Liquidation Distribution").

     "Guarantee Trustee" means LaSalle Bank National Association, until a
Successor Guarantee Trustee has been appointed and has accepted such appointment
pursuant to the terms of this Guarantee and thereafter means each such Successor
Guarantee Trustee.

     "Holder" means any holder, as registered on the books and records of the
Issuer, of any Capital Securities; provided, however, that, in determining
whether the holders of the requisite percentage of Capital Securities have given
any request, notice, consent or waiver hereunder, "Holder" shall not include the
Guarantor or any Affiliate of the Guarantor.

     "Indemnified Person" means the Guarantee Trustee (including in its
individual capacity), any Affiliate of the Guarantee Trustee, or any officers,
directors, shareholders, members, partners, employees, representatives,
nominees, custodians or agents of the Guarantee Trustee.

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     "Indenture" means the Indenture, dated as of July 15, 2005, between the
Guarantor and LaSalle Bank National Association, not in its individual capacity
but solely as trustee, and any indenture supplemental thereto pursuant to which
the Debentures are to be issued to the Institutional Trustee of the Issuer.

     "Liquidation Distribution" has the meaning set forth in the definition of
"Guarantee Payments" herein.

     "Majority in liquidation amount of the Capital Securities" means Holder(s)
of outstanding Capital Securities, voting together as a class, but separately
from the holders of Common Securities, of more than 50% of the aggregate
liquidation amount (including the stated amount that would be paid on
redemption, liquidation or otherwise, plus accrued and unpaid Distributions to,
but excluding, the date upon which the voting percentages are determined) of all
Capital Securities then outstanding.

     "Obligations" means any costs, expenses or liabilities (but not including
liabilities related to taxes) of the Issuer, other than obligations of the
Issuer to pay to holders of any Trust Securities the amounts due such holders
pursuant to the terms of the Trust Securities.

     "Officer's Certificate" means, with respect to any Person, a certificate
signed by one Authorized Officer of such Person. Any Officer's Certificate
delivered with respect to compliance with a condition or covenant provided for
in this Guarantee shall include:

          (a) a statement that each officer signing the Officer's Certificate
     has read the covenant or condition and the definitions relating thereto;

          (b) a brief statement of the nature and scope of the examination or
     investigation undertaken by each officer in rendering the Officer's
     Certificate;

          (c) a statement that each such officer has made such examination or
     investigation as, in such officer's opinion, is necessary to enable such
     officer to express an informed opinion as to whether or not such covenant
     or condition has been complied with; and

          (d) a statement as to whether, in the opinion of each such officer,
     such condition or covenant has been complied with.

     "Person" means a legal person, including any individual, corporation,
estate, partnership, joint venture, association, joint stock company, limited
liability company, trust, unincorporated association, or government or any
agency or political subdivision thereof, or any other entity of whatever nature.

     "Responsible Officer" means, with respect to the Guarantee Trustee, any
officer within the CDO Trust Services Group of the Corporate Trust Office of the
Guarantee Trustee with direct responsibility for the administration of any
matters relating to this Guarantee, including any vice president, any assistant
vice president, any secretary, any assistant secretary, the treasurer, any
assistant treasurer, any trust officer or other officer of the Corporate Trust
Office of the Guarantee Trustee customarily performing functions similar to
those performed by



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any of the above designated officers and also means, with respect to a
particular corporate trust matter, any other officer to whom such matter is
referred because of that officer's knowledge of and familiarity with the
particular subject.

     "Successor Guarantee Trustee" means a successor Guarantee Trustee
possessing the qualifications to act as Guarantee Trustee under Section 3.1.

     "Trust Securities" means the Common Securities and the Capital Securities.

                                   ARTICLE II
               POWERS, DUTIES AND RIGHTS OF THE GUARANTEE TRUSTEE

SECTION 2.1. Powers and Duties of the Guarantee Trustee.

          (a) This Guarantee shall be held by the Guarantee Trustee for the
     benefit of the Holders of the Capital Securities, and the Guarantee Trustee
     shall not transfer this Guarantee to any Person except a Holder of Capital
     Securities exercising his or her rights pursuant to Section 4.4(b) or to a
     Successor Guarantee Trustee on acceptance by such Successor Guarantee
     Trustee of its appointment to act as Successor Guarantee Trustee. The
     right, title and interest of the Guarantee Trustee shall automatically vest
     in any Successor Guarantee Trustee, and such vesting and cessation of title
     shall be effective whether or not conveyancing documents have been executed
     and delivered pursuant to the appointment of such Successor Guarantee
     Trustee.

          (b) If an Event of Default actually known to a Responsible Officer of
     the Guarantee Trustee has occurred and is continuing, the Guarantee Trustee
     shall enforce this Guarantee for the benefit of the Holders of the Capital
     Securities.

          (c) The Guarantee Trustee, before the occurrence of any Event of
     Default and after the curing or waiving of all Events of Default that may
     have occurred, shall undertake to perform only such duties as are
     specifically set forth in this Guarantee, and no implied covenants shall be
     read into this Guarantee against the Guarantee Trustee. In case an Event of
     Default has occurred (that has not been cured or waived pursuant to Section
     2.4(b)) and is actually known to a Responsible Officer of the Guarantee
     Trustee, the Guarantee Trustee shall exercise such of the rights and powers
     vested in it by this Guarantee, and use the same degree of care and skill
     in its exercise thereof, as a prudent person would exercise or use under
     the circumstances in the conduct of his or her own affairs.

          (d) No provision of this Guarantee shall be construed to relieve the
     Guarantee Trustee from liability for its own negligent action, its own
     negligent failure to act, or its own willful misconduct, except that:

               (i) prior to the occurrence of any Event of Default and after the
          curing or waiving of all Events of Default that may have occurred:

                    (A) the duties and obligations of the Guarantee Trustee
               shall be determined solely by the express provisions of this
               Guarantee, and the


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               Guarantee Trustee shall not be liable except for the performance
               of such duties and obligations as are specifically set forth in
               this Guarantee, and no implied covenants or obligations shall be
               read into this Guarantee against the Guarantee Trustee; and

                    (B) in the absence of bad faith on the part of the Guarantee
               Trustee, the Guarantee Trustee may conclusively rely, as to the
               truth of the statements and the correctness of the opinions
               expressed therein, upon any certificates or opinions furnished to
               the Guarantee Trustee and conforming to the requirements of this
               Guarantee; but in the case of any such certificates or opinions
               furnished to the Guarantee Trustee, the Guarantee Trustee shall
               be under a duty to examine the same to determine whether or not
               on their face they conform to the requirements of this Guarantee;

               (ii) the Guarantee Trustee shall not be liable for any error of
          judgment made in good faith by a Responsible Officer of the Guarantee
          Trustee, unless it shall be proved that such Responsible Officer of
          the Guarantee Trustee or the Guarantee Trustee was negligent in
          ascertaining the pertinent facts upon which such judgment was made;

               (iii) the Guarantee Trustee shall not be liable with respect to
          any action taken or omitted to be taken by it in good faith in
          accordance with the written direction of the Holders of not less than
          a Majority in liquidation amount of the Capital Securities relating to
          the time, method and place of conducting any proceeding for any remedy
          available to the Guarantee Trustee, or exercising any trust or power
          conferred upon the Guarantee Trustee under this Guarantee; and

               (iv) no provision of this Guarantee shall require the Guarantee
          Trustee to expend or risk its own funds or otherwise incur personal
          financial liability in the performance of any of its duties or in the
          exercise of any of its rights or powers, if the Guarantee Trustee
          shall have reasonable grounds for believing that the repayment of such
          funds is not reasonably assured to it under the terms of this
          Guarantee, or security and indemnity, reasonably satisfactory to the
          Guarantee Trustee, against such risk or liability is not reasonably
          assured to it.

SECTION 2.2. Certain Rights of the Guarantee Trustee.

          (a) Subject to the provisions of Section 2.1:

               (i) The Guarantee Trustee may conclusively rely, and shall be
          fully protected in acting or refraining from acting upon, any
          resolution, certificate, statement, instrument, opinion, report,
          notice, request, direction, consent, order, bond, debenture, note,
          other evidence of indebtedness or other paper or document believed by
          it to be genuine and to have been signed, sent or presented by the
          proper party or parties.

               (ii) Any direction or act of the Guarantor contemplated by this
          Guarantee shall be sufficiently evidenced by an Officer's Certificate.


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               (iii) Whenever, in the administration of this Guarantee, the
          Guarantee Trustee shall deem it desirable that a matter be proved or
          established before taking, suffering or omitting any action hereunder,
          the Guarantee Trustee (unless other evidence is herein specifically
          prescribed) may, in the absence of bad faith on its part, request and
          conclusively rely upon an Officer's Certificate of the Guarantor
          which, upon receipt of such request, shall be promptly delivered by
          the Guarantor.

               (iv) The Guarantee Trustee shall have no duty to see to any
          recording, filing or registration of any instrument or other writing
          (or any rerecording, refiling or reregistration thereof).

               (v) The Guarantee Trustee may consult with counsel of its
          selection, and the advice or opinion of such counsel with respect to
          legal matters shall be full and complete authorization and protection
          in respect of any action taken, suffered or omitted by it hereunder in
          good faith and in accordance with such advice or opinion. Such counsel
          may be counsel to the Guarantor or any of its Affiliates and may
          include any of its employees. The Guarantee Trustee shall have the
          right at any time to seek instructions concerning the administration
          of this Guarantee from any court of competent jurisdiction.

               (vi) The Guarantee Trustee shall be under no obligation to
          exercise any of the rights or powers vested in it by this Guarantee at
          the request or direction of any Holder, unless such Holder shall have
          provided to the Guarantee Trustee such security and indemnity,
          reasonably satisfactory to the Guarantee Trustee, against the costs,
          expenses (including attorneys' fees and expenses and the expenses of
          the Guarantee Trustee's agents, nominees or custodians) and
          liabilities that might be incurred by it in complying with such
          request or direction, including such reasonable advances as may be
          requested by the Guarantee Trustee; provided, however, that nothing
          contained in this Section 2.2(a)(vi) shall be taken to relieve the
          Guarantee Trustee, upon the occurrence of an Event of Default, of its
          obligation to exercise the rights and powers vested in it by this
          Guarantee.

               (vii) The Guarantee Trustee shall not be bound to make any
          investigation into the facts or matters stated in any resolution,
          certificate, statement, instrument, opinion, report, notice, request,
          direction, consent, order, bond, debenture, note, other evidence of
          indebtedness or other paper or document, but the Guarantee Trustee, in
          its discretion, may make such further inquiry or investigation into
          such facts or matters as it may see fit.

               (viii) The Guarantee Trustee may execute any of the trusts or
          powers hereunder or perform any duties hereunder either directly or by
          or through agents, nominees, custodians or attorneys, and the
          Guarantee Trustee shall not be responsible for any misconduct or
          negligence on the part of any agent or attorney appointed with due
          care by it hereunder.

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               (ix) Any action taken by the Guarantee Trustee or its agents
          hereunder shall bind the Holders of the Capital Securities, and the
          signature of the Guarantee Trustee or its agents alone shall be
          sufficient and effective to perform any such action. No third party
          shall be required to inquire as to the authority of the Guarantee
          Trustee to so act or as to its compliance with any of the terms and
          provisions of this Guarantee, both of which shall be conclusively
          evidenced by the Guarantee Trustee's or its agent's taking such
          action.

               (x) Whenever in the administration of this Guarantee the
          Guarantee Trustee shall deem it desirable to receive instructions with
          respect to enforcing any remedy or right or taking any other action
          hereunder, the Guarantee Trustee (A) may request instructions from the
          Holders of a Majority in liquidation amount of the Capital Securities,
          (B) may refrain from enforcing such remedy or right or taking such
          other action until such instructions are received and (C) shall be
          protected in conclusively relying on or acting in accordance with such
          instructions.

               (xi) The Guarantee Trustee shall not be liable for any action
          taken, suffered, or omitted to be taken by it in good faith and
          reasonably believed by it to be authorized or within the discretion or
          rights or powers conferred upon it by this Guarantee.

          (b) No provision of this Guarantee shall be deemed to impose any duty
     or obligation on the Guarantee Trustee to perform any act or acts or
     exercise any right, power, duty or obligation conferred or imposed on it,
     in any jurisdiction in which it shall be illegal or in which the Guarantee
     Trustee shall be unqualified or incompetent in accordance with applicable
     law to perform any such act or acts or to exercise any such right, power,
     duty or obligation. No permissive power or authority available to the
     Guarantee Trustee shall be construed to be a duty.

SECTION 2.3. Not Responsible for Recitals or Issuance of Guarantee.

     The recitals contained in this Guarantee shall be taken as the statements
of the Guarantor, and the Guarantee Trustee does not assume any responsibility
for their correctness. The Guarantee Trustee makes no representation as to the
validity or sufficiency of this Guarantee.

SECTION 2.4. Events of Default; Waiver.

          (a) An Event of Default under this Guarantee will occur upon the
     failure of the Guarantor to perform any of its payment or other obligations
     hereunder.

          (b) The Holders of a Majority in liquidation amount of the Capital
     Securities may, voting or consenting as a class, on behalf of the Holders
     of all of the Capital Securities, waive any past Event of Default and its
     consequences. Upon such waiver, any such Event of Default shall cease to
     exist, and shall be deemed to have been cured, for every purpose of this
     Guarantee, but no such waiver shall extend to any subsequent or other
     default or Event of Default or impair any right consequent thereon.


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SECTION 2.5. Events of Default; Notice.

          (a) The Guarantee Trustee shall, within 90 days after the occurrence
     of an Event of Default, transmit by mail, first class postage prepaid, to
     the Holders of the Capital Securities, notices of all Events of Default
     actually known to a Responsible Officer of the Guarantee Trustee, unless
     such defaults have been cured before the giving of such notice; provided,
     however, that the Guarantee Trustee shall be protected in withholding such
     notice if and so long as a Responsible Officer of the Guarantee Trustee in
     good faith determines that the withholding of such notice is in the
     interests of the Holders of the Capital Securities.

          (b) The Guarantee Trustee shall not be charged with knowledge of any
     Event of Default unless the Guarantee Trustee shall have received written
     notice thereof from the Guarantor or a Holder of the Capital Securities, or
     a Responsible Officer of the Guarantee Trustee charged with the
     administration of this Guarantee shall have actual knowledge thereof.

                                  ARTICLE III
                              THE GUARANTEE TRUSTEE

SECTION 3.1. The Guarantee Trustee; Eligibility.

          (a) There shall at all times be a Guarantee Trustee which shall:

               (i) not be an Affiliate of the Guarantor; and

               (ii) be a corporation or national association organized and doing
          business under the laws of the United States of America or any state
          or territory thereof or of the District of Columbia, or Person
          authorized under such laws to exercise corporate trust powers, having
          a combined capital and surplus of at least Fifty Million U.S. Dollars
          ($50,000,000), and subject to supervision or examination by federal,
          state, territorial or District of Columbia authority. If such
          corporation or national association publishes reports of condition at
          least annually, pursuant to law or to the requirements of the
          supervising or examining authority referred to above, then, for the
          purposes of this Section 3.1(a)(ii), the combined capital and surplus
          of such corporation or national association shall be deemed to be its
          combined capital and surplus as set forth in its most recent report of
          condition so published.

          (b) If at any time the Guarantee Trustee shall cease to be eligible to
     so act under Section 3.1(a), the Guarantee Trustee shall immediately resign
     in the manner and with the effect set forth in Section 3.2(c).

          (c) If the Guarantee Trustee has or shall acquire any "conflicting
     interest' within the meaning of Section 310(b) of the Trust Indenture Act,
     the Guarantee Trustee shall either eliminate such interest or resign to the
     extent and in the manner provided by, and subject to, this Guarantee.



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SECTION 3.2. Appointment, Removal and Resignation of the Guarantee Trustee.

          (a) Subject to Section 3.2(b), the Guarantee Trustee may be appointed
     or removed without cause at any time by the Guarantor except during an
     Event of Default.

          (b) The Guarantee Trustee shall not be removed in accordance with
     Section 3.2(a) until a Successor Guarantee Trustee has been appointed and
     has accepted such appointment by written instrument executed by such
     Successor Guarantee Trustee and delivered to the Guarantor.

          (c) The Guarantee Trustee appointed to office shall hold office until
     a Successor Guarantee Trustee shall have been appointed or until its
     removal or resignation. The Guarantee Trustee may resign from office
     (without need for prior or subsequent accounting) by an instrument in
     writing executed by the Guarantee Trustee and delivered to the Guarantor,
     which resignation shall not take effect until a Successor Guarantee Trustee
     has been appointed and has accepted such appointment by an instrument in
     writing executed by such Successor Guarantee Trustee and delivered to the
     Guarantor and the resigning Guarantee Trustee.

          (d) If no Successor Guarantee Trustee shall have been appointed and
     accepted appointment as provided in this Section 3.2 within 60 days after
     delivery of an instrument of removal or resignation, the Guarantee Trustee
     resigning or being removed may petition any court of competent jurisdiction
     for appointment of a Successor Guarantee Trustee. Such court may thereupon,
     after prescribing such notice, if any, as it may deem proper, appoint a
     Successor Guarantee Trustee.

          (e) No Guarantee Trustee shall be liable for the acts or omissions to
     act of any Successor Guarantee Trustee.

          (f) Upon termination of this Guarantee or removal or resignation of
     the Guarantee Trustee pursuant to this Section 3.2, the Guarantor shall pay
     to the Guarantee Trustee all amounts owing to the Guarantee Trustee under
     Sections 7.2 and 7.3 accrued to the date of such termination, removal or
     resignation.

                                   ARTICLE IV
                                   GUARANTEE

SECTION 4.1. Guarantee.

          (a) The Guarantor irrevocably and unconditionally agrees to pay in
     full to the Holders the Guarantee Payments (without duplication of amounts
     theretofore paid by the Issuer), as and when due, regardless of any defense
     (except as defense of payment by the Issuer), right of set-off or
     counterclaim that the Issuer may have or assert. The Guarantor's obligation
     to make a Guarantee Payment may be satisfied by direct payment of the
     required amounts by the Guarantor to the Holders or by causing the Issuer
     to pay such amounts to the Holders.



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          (b) The Guarantor hereby also agrees to assume any and all Obligations
     of the Issuer and in the event any such Obligation is not so assumed,
     subject to the terms and conditions hereof, the Guarantor hereby
     irrevocably and unconditionally guarantees to each Beneficiary the full
     payment, when and as due, of any and all Obligations to such Beneficiaries.
     This Guarantee is intended to be for the Beneficiaries who have received
     notice hereof.

SECTION 4.2. Waiver of Notice and Demand.

     The Guarantor hereby waives notice of acceptance of this Guarantee and of
any liability to which it applies or may apply, presentment, demand for payment,
any right to require a proceeding first against the Issuer or any other Person
before proceeding against the Guarantor, protest, notice of nonpayment, notice
of dishonor, notice of redemption and all other notices and demands.

SECTION 4.3. Obligations Not Affected.

     The obligations, covenants, agreements and duties of the Guarantor under
this Guarantee shall in no way be affected or impaired by reason of the
happening from time to time of any of the following:

          (a) the release or waiver, by operation of law or otherwise, of the
     performance or observance by the Issuer of any express or implied
     agreement, covenant, term or condition relating to the Capital Securities
     to be performed or observed by the Issuer;

          (b) the extension of time for the payment by the Issuer of all or any
     portion of the Distributions, Redemption Price, Special Redemption Price,
     Liquidation Distribution or any other sums payable under the terms of the
     Capital Securities or the extension of time for the performance of any
     other obligation under, arising out of, or in connection with, the Capital
     Securities (other than an extension of time for the payment of the
     Distributions, Redemption Price, Special Redemption Price, Liquidation
     Distribution or other sums payable that results from the extension of any
     interest payment period on the Debentures or any extension of the maturity
     date of the Debentures permitted by the Indenture);

          (c) any failure, omission, delay or lack of diligence on the part of
     the Holders to enforce, assert or exercise any right, privilege, power or
     remedy conferred on the Holders pursuant to the terms of the Capital
     Securities, or any action on the part of the Issuer granting indulgence or
     extension of any kind;

          (d) the voluntary or involuntary liquidation, dissolution, sale of any
     collateral, receivership, insolvency, bankruptcy, assignment for the
     benefit of creditors, reorganization, arrangement, composition or
     readjustment of debt of, or other similar proceedings affecting, the Issuer
     or any of the assets of the Issuer;

          (e) any invalidity of, or defect or deficiency in, the Capital
     Securities;



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          (f) the settlement or compromise of any obligation guaranteed hereby
     or hereby incurred; or

          (g) any other circumstance whatsoever that might otherwise constitute
     a legal or equitable discharge or defense of a guarantor, it being the
     intent of this Section 4.3 that the obligations of the Guarantor hereunder
     shall be absolute and unconditional under any and all circumstances. There
     shall be no obligation of the Holders to give notice to, or obtain consent
     of, the Guarantor with respect to the happening of any of the foregoing.

SECTION 4.4. Rights of Holders.

          (a) The Holders of a Majority in liquidation amount of the Capital
     Securities have the right to direct the time, method and place of
     conducting any proceeding for any remedy available to the Guarantee Trustee
     in respect of this Guarantee or to direct the exercise of any trust or
     power conferred upon the Guarantee Trustee under this Guarantee; provided,
     however, that (subject to Sections 2.1 and 2.2) the Guarantee Trustee shall
     have the right to decline to follow any such direction if the Guarantee
     Trustee shall determine that the actions so directed would be unjustly
     prejudicial to the Holders not taking part in such direction or if the
     Guarantee Trustee being advised by legal counsel determines that the action
     or proceeding so directed may not lawfully be taken or if the Guarantee
     Trustee in good faith by its board of directors or trustees, executive
     committee or a trust committee of directors or trustees and/or Responsible
     Officers shall determine that the action or proceeding so directed would
     involve the Guarantee Trustee in personal liability.

          (b) Any Holder of Capital Securities may institute a legal proceeding
     directly against the Guarantor to enforce the Guarantee Trustee's rights
     under this Guarantee, without first instituting a legal proceeding against
     the Issuer, the Guarantee Trustee or any other Person. The Guarantor waives
     any right or remedy to require that any such action be brought first
     against the Issuer, the Guarantee Trustee or any other Person before so
     proceeding directly against the Guarantor.

SECTION 4.5. Guarantee of Payment.

     This Guarantee creates a guarantee of payment and not of collection.

SECTION 4.6. Subrogation.

     The Guarantor shall be subrogated to all (if any) rights of the Holders of
Capital Securities against the Issuer in respect of any amounts paid to such
Holders by the Guarantor under this Guarantee; provided, however, that the
Guarantor shall not (except to the extent required by applicable provisions of
law) be entitled to enforce or exercise any right that it may acquire by way of
subrogation or any indemnity, reimbursement or other agreement, in all cases as
a result of payment under this Guarantee, if, after giving effect to any such
payment, any amounts are due and unpaid under this Guarantee. If any amount
shall be paid to the Guarantor



                                     - 11 -


<PAGE>

in violation of the preceding sentence, the Guarantor agrees to hold such amount
in trust for the Holders and to pay over such amount to the Holders.

SECTION 4.7. Independent Obligations.

     The Guarantor acknowledges that its obligations hereunder are independent
of the obligations of the Issuer with respect to the Capital Securities and that
the Guarantor shall be liable as principal and as debtor hereunder to make
Guarantee Payments pursuant to the terms of this Guarantee notwithstanding the
occurrence of any event referred to in subsections (a) through (g), inclusive,
of Section 4.3 hereof.

SECTION 4.8. Enforcement.

     A Beneficiary may enforce the Obligations of the Guarantor contained in
Section 4.1(b) directly against the Guarantor, and the Guarantor waives any
right or remedy to require that any action be brought against the Issuer or any
other person or entity before proceeding against the Guarantor.

     The Guarantor shall be subrogated to all rights (if any) of any Beneficiary
against the Issuer in respect of any amounts paid to the Beneficiaries by the
Guarantor under this Guarantee; provided, however, that the Guarantor shall not
(except to the extent required by applicable provisions of law) be entitled to
enforce or exercise any rights that it may acquire by way of subrogation or any
indemnity, reimbursement or other agreement, in all cases as a result of payment
under this Guarantee, if, after giving effect to such payment, any amounts are
due and unpaid under this Guarantee.

                                   ARTICLE V
                   LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 5.1. Limitation of Transactions.

     So long as any Capital Securities remain outstanding, if (a) there shall
have occurred and be continuing an Event of Default or (b) the Guarantor shall
have selected an Extension Period as provided in the Declaration and such
period, or any extension thereof, shall have commenced and be continuing, then
the Guarantor may not (x) declare or pay any dividends or distributions on, or
redeem, purchase, acquire, or make a liquidation payment with respect to, any of
the Guarantor's capital stock or (y) make any payment of principal of or
interest or premium, if any, on or repay, repurchase or redeem any debt
securities of the Guarantor that rank PARI PASSU in all respects with or junior
in interest to the Debentures (other than (i) payments under this Guarantee,
(ii) repurchases, redemptions or other acquisitions of shares of capital stock
of the Guarantor (A) in connection with any employment contract, benefit plan or
other similar arrangement with or for the benefit of one or more employees,
officers, directors, or consultants, (B) in connection with a dividend
reinvestment or stockholder stock purchase plan or (C) in connection with the
issuance of capital stock of the Guarantor (or securities convertible into or
exercisable for such capital stock), as consideration in an acquisition
transaction entered into prior to the occurrence of the Event of Default or the
applicable Extension Period, (iii) as a result of any exchange,
reclassification, combination or conversion of any class or series of the
Guarantor's capital stock (or any capital stock of a


                                     - 12 -

<PAGE>


subsidiary of the Guarantor) for any class or series of the Guarantor's capital
stock or of any class or series of the Guarantor's indebtedness for any class or
series of the Guarantor's capital stock, (iv) the purchase of fractional
interests in shares of the Guarantor's capital stock pursuant to the conversion
or exchange provisions of such capital stock or the security being converted or
exchanged, (v) any declaration of a dividend in connection with any
stockholder's rights plan, or the issuance of rights, stock or other property
under any stockholder's rights plan, or the redemption or repurchase of rights
pursuant thereto, or (vi) any dividend in the form of stock, warrants, options
or other rights where the dividend stock or the stock issuable upon exercise of
such warrants, options or other rights is the same stock as that on which the
dividend is being paid or ranks PARI PASSU with or junior to such stock).

SECTION 5.2. Ranking.

     This Guarantee will constitute an unsecured obligation of the Guarantor and
will rank subordinate and junior in right of payment to all present and future
Senior Indebtedness (as defined in the Indenture) of the Guarantor. By their
acceptance thereof, each Holder of Capital Securities agrees to the foregoing
provisions of this Guarantee and the other terms set forth herein.

     The right of the Guarantor to participate in any distribution of assets of
any of its subsidiaries upon any such subsidiary's liquidation or reorganization
or otherwise is subject to the prior claims of creditors of that subsidiary,
except to the extent the Guarantor may itself be recognized as a creditor of
that subsidiary. Accordingly, the Guarantor's obligations under this Guarantee
will be effectively subordinated to all existing and future liabilities of the
Guarantor's subsidiaries, and claimants should look only to the assets of the
Guarantor for payments thereunder. This Guarantee does not limit the incurrence
or issuance of other secured or unsecured debt of the Guarantor, including
Senior Indebtedness of the Guarantor, under any indenture or agreement that the
Guarantor may enter into in the future or otherwise.

                                   ARTICLE VI
                                   TERMINATION

SECTION 6.1. Termination.

     This Guarantee shall terminate as to the Capital Securities (i) upon full
payment of the Redemption Price or the Special Redemption Price, as the case may
be, of all Capital Securities then outstanding, (ii) upon the distribution of
all of the Debentures to the Holders of all of the Capital Securities or (iii)
upon full payment of the amounts payable in accordance with the Declaration upon
dissolution of the Issuer. This Guarantee will continue to be effective or will
be reinstated, as the case may be, if at any time any Holder of Capital
Securities must restore payment of any sums paid under the Capital Securities or
under this Guarantee.



                                     - 13 -



<PAGE>

                                  ARTICLE VII
                                 INDEMNIFICATION

SECTION 7.1. Exculpation.

          (a) No Indemnified Person shall be liable, responsible or accountable
     in damages or otherwise to the Guarantor or any Covered Person for any
     loss, damage or claim incurred by reason of any act or omission of such
     Indemnified Person in good faith in accordance with this Guarantee and in a
     manner that such Indemnified Person reasonably believed to be within the
     scope of the authority conferred on such Indemnified Person by this
     Guarantee or by law, except that an Indemnified Person shall be liable for
     any such loss, damage or claim incurred by reason of such Indemnified
     Person's negligence or willful misconduct with respect to such acts or
     omissions.

          (b) An Indemnified Person shall be fully protected in relying in good
     faith upon the records of the Issuer or the Guarantor and upon such
     information, opinions, reports or statements presented to the Issuer or the
     Guarantor by any Person as to matters the Indemnified Person reasonably
     believes are within such other Person's professional or expert competence
     and who, if selected by such Indemnified Person, has been selected with
     reasonable care by such Indemnified Person, including information,
     opinions, reports or statements as to the value and amount of the assets,
     liabilities, profits, losses, or any other facts pertinent to the existence
     and amount of assets from which Distributions to Holders of Capital
     Securities might properly be paid.

SECTION 7.2. Indemnification.

          (a) The Guarantor agrees to indemnify each Indemnified Person for, and
     to hold each Indemnified Person harmless against, any and all loss,
     liability, damage, claim or expense incurred without negligence or willful
     misconduct on the part of the Indemnified Person, arising out of or in
     connection with the acceptance or administration of the trust or trusts
     hereunder, including but not limited to the costs and expenses (including
     reasonable legal fees and expenses) of the Indemnified Person defending
     itself against, or investigating, any claim or liability in connection with
     the exercise or performance of any of the Indemnified Person's powers or
     duties hereunder. The obligation to indemnify as set forth in this Section
     7.2 shall survive the resignation or removal of the Guarantee Trustee and
     the termination of this Guarantee.

          (b) Promptly after receipt by an Indemnified Person under this Section
     7.2 of notice of the commencement of any action, such Indemnified Person
     will, if a claim in respect thereof is to be made against the Guarantor
     under this Section 7.2, notify the Guarantor in writing of the commencement
     thereof; but the failure so to notify the Guarantor (i) will not relieve
     the Guarantor from liability under paragraph (a) above unless and to the
     extent that the Guarantor did not otherwise learn of such action and such
     failure results in the forfeiture by the Guarantor of substantial rights
     and defenses and (ii) will not, in any event, relieve the Guarantor from
     any obligations to any Indemnified Person other than the indemnification
     obligation provided in paragraph (a) above. The Guarantor shall be entitled
     to appoint counsel of the Guarantor's choice at the Guarantor's


                                     - 14 -



<PAGE>

     expense to represent the Indemnified Person in any action for which
     indemnification is sought (in which case the Guarantor shall not thereafter
     be responsible for the fees and expenses of any separate counsel retained
     by the Indemnified Person or Persons except as set forth below); provided,
     however, that such counsel shall be satisfactory to the Indemnified Person.
     Notwithstanding the Guarantor's election to appoint counsel to represent
     the Indemnified Person in any action, the Indemnified Person shall have the
     right to employ separate counsel (including local counsel), and the
     Guarantor shall bear the reasonable fees, costs and expenses of such
     separate counsel (and local counsel), if (i) the use of counsel chosen by
     the Guarantor to represent the Indemnified Person would present such
     counsel with a conflict of interest, (ii) the actual or potential
     defendants in, or targets of, any such action include both the Indemnified
     Person and the Guarantor and the Indemnified Person shall have reasonably
     concluded that there may be legal defenses available to it and/or other
     Indemnified Persons which are different from or additional to those
     available to the Guarantor, (iii) the Guarantor shall not have employed
     counsel satisfactory to the Indemnified Person to represent the Indemnified
     Person within a reasonable time after notice of the institution of such
     action or (iv) the Guarantor shall authorize the Indemnified Person to
     employ separate counsel at the expense of the Guarantor. The Guarantor will
     not, without the prior written consent of the Indemnified Persons, settle
     or compromise or consent to the entry of any judgment with respect to any
     pending or threatened claim, action, suit or proceeding in respect of which
     indemnification or contribution may be sought hereunder (whether or not the
     Indemnified Persons are actual or potential parties to such claim or
     action) unless such settlement, compromise or consent includes an
     unconditional release of each Indemnified Person from all liability arising
     out of such claim, action, suit or proceeding.

SECTION 7.3. Compensation; Reimbursement of Expenses.

     Other than as provided in the Fee Agreement of even date herewith between
Cohen Bros. & Company, the Guarantee Trustee and Delaware Trustee (as defined in
the Declaration), the Guarantor agrees:

          (a) to pay to the Guarantee Trustee from time to time such
     compensation for all services rendered by it hereunder as the parties shall
     agree to from time to time (which compensation shall not be limited by any
     provision of law in regard to the compensation of a trustee of an express
     trust); and

          (b) except as otherwise expressly provided herein, to reimburse the
     Guarantee Trustee upon request for all reasonable expenses, disbursements
     and advances incurred or made by it in accordance with any provision of
     this Guarantee (including the reasonable compensation and the expenses and
     disbursements of its agents and counsel), except any such expense,
     disbursement or advance as may be attributable to its negligence or willful
     misconduct.

          The provisions of this Section 7.3 shall survive the resignation or
     removal of the Guarantee Trustee and the termination of this Guarantee.


                                     - 15 -



<PAGE>

                                  ARTICLE VIII
                                  MISCELLANEOUS

SECTION 8.1. Successors and Assigns.

     All guarantees and agreements contained in this Guarantee shall bind the
successors, assigns, receivers, trustees and representatives of the Guarantor
and shall inure to the benefit of the Holders of the Capital Securities then
outstanding. Except in connection with any merger or consolidation of the
Guarantor with or into another entity or any sale, transfer or lease of the
Guarantor's assets or capital stock to another entity, in each case to the
extent permitted under the Indenture, the Guarantor may not assign its rights or
delegate its obligations under this Guarantee without the prior approval of the
Holders of not less than a Majority in liquidation amount of the Capital
Securities.

SECTION 8.2. Amendments.

     Except with respect to any changes that do not adversely affect the rights
of Holders of the Capital Securities in any material respect (in which case no
consent of Holders will be required), this Guarantee may be amended only with
the prior approval of the Holders of not less than a Majority in liquidation
amount of the Capital Securities. The provisions of the Declaration with respect
to amendments thereof shall apply equally with respect to amendments of the
Guarantee.

SECTION 8.3. Notices.

     All notices provided for in this Guarantee shall be in writing, duly signed
by the party giving such notice, and shall be delivered, telecopied or mailed by
first class mail, as follows:

          (a) If given to the Guarantee Trustee, at the Guarantee Trustee's
     mailing address set forth below (or such other address as the Guarantee
     Trustee may give notice of to the Holders of the Capital Securities):

                           LaSalle Bank National Association
                           135 S. LaSalle Street, Suite 1511
                           Chicago, Illinois 60603
                           Attention:  CDO Trust Services Group
                           PNBC Capital Trust I
                           Telecopy:  (312) 904-0524
                           Telephone: (312) 904-0283

          (b) If given to the Guarantor, at the Guarantor's mailing address set
     forth below (or such other address as the Guarantor may give notice of to
     the Holders of the Capital Securities and to the Guarantee Trustee):


                                     - 16 -



<PAGE>

                           Princeton National Bancorp, Inc.
                           606 South Main Street
                           Princeton, Illinois 61356
                           Attention: Todd D. Fanning
                           Telecopy: (815) 872-8018
                           Telephone: (815) 875-4444

          (c) If given to any Holder of the Capital Securities, at the address
     set forth on the books and records of the Issuer.

     All such notices shall be deemed to have been given when received in
person, telecopied with receipt confirmed, or mailed by first class mail,
postage prepaid, except that if a notice or other document is refused delivery
or cannot be delivered because of a changed address of which no notice was
given, such notice or other document shall be deemed to have been delivered on
the date of such refusal or inability to deliver.

SECTION 8.4. Benefit.

     This Guarantee is solely for the benefit of the Holders of the Capital
Securities and, subject to Section 2.1(a), is not separately transferable from
the Capital Securities.

SECTION 8.5. Governing Law.

     THIS GUARANTEE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE
LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES
THEREOF (OTHER THAN SECTION 5-1401 OF THE GENERAL OBLIGATIONS LAW).

SECTION 8.6. Counterparts.

     This Guarantee may contain more than one counterpart of the signature page
and this Guarantee may be executed by the affixing of the signature of the
Guarantor and the Guarantee Trustee to any of such counterpart signature pages.
All of such counterpart signature pages shall be read as though one, and they
shall have the same force and effect as though all of the signers had signed a
single signature page.


                                     - 17 -



<PAGE>

     THIS GUARANTEE is executed as of the day and year first above written.

                                             PRINCETON NATIONAL BANCORP, INC.,
                                             AS GUARANTOR


                                             By:
                                                --------------------------------
                                             Name:
                                                  ------------------------------
                                             Title:
                                                   -----------------------------



                                             LASALLE BANK NATIONAL
                                             ASSOCIATION, AS GUARANTEE TRUSTEE


                                             By:
                                                --------------------------------
                                             Name:
                                                  ------------------------------
                                             Title:
                                                   -----------------------------






                                     - 18 -